Our youngest son is taking his second online class at OCCC. So far, he's happy with the school itself and the online format.
OCCC offers a decent selection of online 8 week, 16 week, and interession classes.
He's commented on the wide age range of the students in class.
If you do decide to take an online class, don't underestimate the amount of work involved. Online classes can be quite challenging. They also fill up quickly.